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Transcript of wave analysis
7/21/2019 wave analysis
http://slidepdf.com/reader/full/wave-analysis-56dd899339895 1/12
Research Topic:Optimisation of
O shore Wind TurbineSupporting Structures
7/21/2019 wave analysis
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Presentation Outline
1.Concept of Wind Turbine andRelevance.Research !otivation
".#im of Research$.Ob%ectives&.Present Wor's So far
(.)uture Wor' Plans*.+no,ledge -mpact
7/21/2019 wave analysis
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Concept of Wind Turbine andRelevance
7/21/2019 wave analysis
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-ndustrial emand/Challenge
Relating demands perspective to structuralintegrit0
• eeper depth ,hich re2uires more steel3 thus
construction becomes heavier. Slenderness ofthe structure in regards to structural responsebecomes a critical design issue
• 4igher demand for energ0 re2uires biggerturbines3 thereb0 more structural load on the,ind turbine supporting structures
7/21/2019 wave analysis
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Research !otivation 5imitations on Codes andStandards
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Research !otivation 5imitations on Codes andStandards
• 6urocode limitations Similar to C- 6CT• 7ield strength 8 $(9 /mm 3• ominal tube thic'ness .&mm 8 t 8 &mm• ;racing inclination angle
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Research #im
• To derive equations that can predict accurately the stress-fatigue relationship of tubular steel joints of o shore windturbine supporting structures for structural optimisation.
Tas's to #chieve #im :
• =uantif0ing and de>ning and the structural load ?o, of the super@structure to the sub@structure. # t0pical eAisting o shore ,indturbine ,ould be modelled
• -dentif0ing the limitations on the di erent t0pical tubular steel %ointsof di erent codes and Standards.
• Carr0out numerical Simulation on these t0pical tubular steel %ointsand validate ,ith eAisting models
• Carr0out anal0sis on upper limits of geometric and steel strengthof present codes and standards of 6urocode and C- 6CT.
• Balidate result ,ith other Stress@)atigue resistance of ,eldedtubular %oints
7/21/2019 wave analysis
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Present Wor's• Quantifying Wind Load
,ind turbine soft,are is use to determine the thrust and moments on the bladind turbine.
)orce on blade against incident ,ind
7/21/2019 wave analysis
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Present Wor's• Quantifying Wind Load
,ind turbine soft,are is use to determine the thrust and moments on the bladind turbine.
)orce on blade against TSR
7/21/2019 wave analysis
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Present Wor's• Quantifying tresses on !valuation on T-"oint
ell and Solid elements ,ere used to create a T@%oint to eAamine the results obt
Shell elements
7/21/2019 wave analysis
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Present Wor's• Quantifying tresses on !valuation on T-"oint
ell and Solid elements ,ere used to create a T@%oint to eAamine the results obt
Solid elements
7/21/2019 wave analysis
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References
• #illingham "$ %ealy "$ and purrier "$ Current andpotential use of high strength steels in o shorestructuresD3 !T Publication E&/19 F1EE&G3 -S; 1@
H*9@&""@ $@1• &odgers ' "$ and Loc(head " )$ The ,elding of grade
$&9 o shore structural steelsD3 Proc Conf. on Weldingand Weld Properties in the O shore -ndustr035ondon3 #pril 1EE
• Webster !$ Structural materials for o shorestructures I past3 present and futureD3 Proc.Conf. onSafe esign and )abrication of O shore Structures3-;C3 5ondon3 Sept. 1EE"
•
%ealy "$ and #illingham "$ 4igh strength steels I aviable option for o shore designsD3 6uroforum